Ah...Interesting...I can see you have some good mods as your Inspirations...
Some Advice:
1>For Republican Unique Troops, I suggest:
- Republican Assault Sappers - Elite Assault Engineers with Core Abilities of Deploying Bamboo Walls, Pavise Shields, Wooden Stakes, and Flash Grenades for helping Assaults. They could either be capped or have low numbers per unit. If you want, you can make them competent in assault, either by giving powerful charge or abilities such as Banzai, Heroic Assault. Appearance-Wise: Denshutai-style French Hats, Long Trenchcoats, double Sheets, Backpacks; May be mixed with RM Shako and Tunic.
-Republican Mounted Scout Raiders - Think of Confederate Raiders during The American Civil War. Crack Revolver Cavalry with Long Campaignmap Range, and Battlefield Kisho Deployment. Needs to be capped. Appearance: Stetson Hats, US Kepis, with Japanese Paper and Bamboo Jingasa thrown to the mix; does not look very uniform.
- Republican Military Police - I'd say turn your Revolver Police into This. Its essentially a Mini-General, with Support Abilities such as Heroic Assault, Stand Firm, and Second Wind...But the actual unit number and stats are piss-poor; all they can do is shouting FOR THE REPUBLIC...
- Snipers - Very Low Numbers, but have Special Projectile made for the unit only, range of 225. Stealth, Kisho Deployment, Campaignmap Stealth. Appearance? you know the idea...
2> Isn't Surprise Attack Troops is Satsuma Domain's unit during The Seinan War? Just make them into Satsuma's answer to the Yugekitai. Satsuma only have Black Bears anyway...
That Suits looks to...much. Change them to Officer Long Trenchcoats or Cinematic European Worker's Suits.
3> The Sendai Domain also does not have Special Units - Give Them Karasugumi, something like a Kishu Sharpshooter unit.
4> Color your Rikusentai White.
5> Stand Firm is an Ability too powerful for mere reservists.
6> Lancer Kibatai is a better name.
7>Hmm, What special unit should Saga have? Some Shizoku Samurai who resents their status abolishment and offers to be the Spearhead of Invasion of Korea?
8>The Tsu? maybe some Cheap Skirmisher...Stealthy, Kishu Training...but poor stats...There's a possible name reference but i'm not remember...
9> If you want to make Hero Units...There's two:
-Yamamoto Yaeko Joshigun Rifles - Aizu Only - Onna Bushi Joshitai armed with Rapid-Firing Repeater Rifles.
-Nakano Takeko Naginata Joshitai - Aizu Only - Onna Bushi Naginata Hero.
Appearance-Wise, Use Warrior Nun model, Except for The Head.